MW2291A1 - Two-stage peroxide bleaching process - Google Patents

Two-stage peroxide bleaching process

Info

Publication number
MW2291A1
MW2291A1 MW22/91A MW2291A MW2291A1 MW 2291 A1 MW2291 A1 MW 2291A1 MW 22/91 A MW22/91 A MW 22/91A MW 2291 A MW2291 A MW 2291A MW 2291 A1 MW2291 A1 MW 2291A1
Authority
MW
MALAWI
Prior art keywords
bleaching process
peroxide bleaching
stage peroxide
stage
peroxide
Prior art date
Application number
MW22/91A
Other languages
English (en)
Original Assignee
Ici Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ici Canada filed Critical Ici Canada
Publication of MW2291A1 publication Critical patent/MW2291A1/xx

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
MW22/91A 1990-07-06 1991-06-27 Two-stage peroxide bleaching process MW2291A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/549,145 US5118389A (en) 1990-07-06 1990-07-06 Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp

Publications (1)

Publication Number Publication Date
MW2291A1 true MW2291A1 (en) 1992-03-11

Family

ID=24191848

Family Applications (1)

Application Number Title Priority Date Filing Date
MW22/91A MW2291A1 (en) 1990-07-06 1991-06-27 Two-stage peroxide bleaching process

Country Status (13)

Country Link
US (1) US5118389A (xx)
EP (1) EP0466411A1 (xx)
JP (1) JPH06341078A (xx)
AU (1) AU634665B2 (xx)
CA (1) CA2045754A1 (xx)
FI (1) FI913279A (xx)
MW (1) MW2291A1 (xx)
NO (1) NO912641L (xx)
NZ (1) NZ238830A (xx)
PT (1) PT98226A (xx)
ZA (1) ZA915010B (xx)
ZM (1) ZM2691A1 (xx)
ZW (1) ZW8491A1 (xx)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1258844B (it) * 1992-01-31 1996-02-29 Ausimont Spa Procedimento per la delignificazione di cellulosa grezza
CA2063351C (en) * 1992-03-18 1996-08-13 Stanley Alan Heimburger Process for bleaching hardwood pulp
US6001218A (en) * 1994-06-29 1999-12-14 Kimberly-Clark Worldwide, Inc. Production of soft paper products from old newspaper
US6074527A (en) * 1994-06-29 2000-06-13 Kimberly-Clark Worldwide, Inc. Production of soft paper products from coarse cellulosic fibers
US5582681A (en) * 1994-06-29 1996-12-10 Kimberly-Clark Corporation Production of soft paper products from old newspaper
US6296736B1 (en) 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US6387210B1 (en) 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers
SE517297E (sv) * 1999-09-10 2004-12-07 Stora Enso Ab Metod vid produktion av mekanisk massa från ett cellulosainnehållande material, massa framställd enligt metoden samt kartong producerad av massan
US7052578B2 (en) * 2000-01-28 2006-05-30 Martin Marietta Magnesia Specialties, Inc. Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
US7001484B2 (en) * 2000-05-04 2006-02-21 University Of New Brunswick Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent
SE516969C2 (sv) * 2000-08-14 2002-03-26 Metso Paper Inc Klordioxidblekning i två steg med återföring av filtrat
US20030062138A1 (en) * 2001-05-09 2003-04-03 Hache Maurice Joseph Albert Method for brightening mechanical pulps
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
US10306915B2 (en) * 2014-04-28 2019-06-04 Altria Client Services Llc Peroxides to limit biofilms and tobacco-specific nitrosamines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942661A (en) * 1956-12-18 1960-06-28 Beloit Iron Works Multi-ply sheet former
US3147178A (en) * 1961-05-18 1964-09-01 St Joe Paper Company Sulphate digestion process
US4731160A (en) * 1986-03-19 1988-03-15 Kamyr, Inc. Drainage characteristics of mechanical pulp
SE455203B (sv) * 1986-10-20 1988-06-27 Eka Nobel Ab Forfarande for styrning av peroxidblekning av massa
US4798652A (en) * 1987-10-19 1989-01-17 Peter Joyce Peroxide bleaching of mechanical pulps
FR2622221A1 (fr) * 1987-10-22 1989-04-28 Atochem Procede de blanchiment de pates
US4915785A (en) * 1988-12-23 1990-04-10 C-I-L Inc. Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate

Also Published As

Publication number Publication date
PT98226A (pt) 1992-05-29
US5118389A (en) 1992-06-02
AU8024091A (en) 1992-01-09
FI913279A (fi) 1992-01-07
EP0466411A1 (en) 1992-01-15
NO912641L (no) 1992-01-07
NZ238830A (en) 1993-05-26
FI913279A0 (fi) 1991-07-05
ZW8491A1 (en) 1992-03-11
ZM2691A1 (en) 1992-03-27
NO912641D0 (no) 1991-07-05
ZA915010B (en) 1993-02-24
AU634665B2 (en) 1993-02-25
JPH06341078A (ja) 1994-12-13
CA2045754A1 (en) 1992-01-07

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